Rope-thrusting shovel



ATTORNEY.

v 4 V L 3 w 1 4. a AV E; 6 8 V .m W NW R n M m Aug- "10 1926.-

w. FERRIS ErAL ROPE 'rmws'rms sHovEL Original Filed March 24 1921 Aug.10,1926.

. W. FERRIS ET AL ROPE THRLLSTING SHOVEL Original Filed March 24, 1921 3Sheets-Shout 2" I N VEN TORS a a m m K m m n ma 5 M W m mv 5 n m m T ARama Aug. 10, 1926.

UNITED STATES PATENT OFFICE.

WALTER 1mm, 01 MILWAUEE, AND BVANTE B. W. 1. 63B, SOUTH MILWAU- mWISCONSIN, ASSIGNORS I O BUGYBUS COMPANY, 01' SOUTH KILWAUKEE, VHS-OOHSIH, A. COB POBATIOK OF WISCONSIN;

' aorn-rnnus'rme snovan.

' lb. 1,451,ao1, am June 5, was, Serial No. 455,302, mailman, 1021'.Application mr reissue fled October a, '19. Serial no. 741,173.

This invention relates to; wer shovels,. and more particularly, to sovels of thatctype in which wer actuated devices are 4 employed for eacting and controllin the shifting or thrusting action of the dipperhandle. 1

The general aim' of the present invention isto simplify and improve theconstruction and operation of deviees.of this character.

A more specific object is the provision of a. simple'and improved formof dipper thrusting device, capable of advantageous use in any type ofpower shove-l irrespective of thecharacte'r of prime mover with whichthe shovel may be provided.

Another object is the provision of an improved dipper thrust gearactuable from the main power unit and of such character that shiftingofthedipper handle in either direction may beefl'ected and nicelycontrolled without requiring the use of a reversing gear. t d Another 1object is the provision of an improved dipper thrusting device inwhich asingle cable associated with the power unit may be employled forefiectin a shifting of the dipper andle indepen ently of the hoistingaction of the hoist gear.

Another object is the provision of an improved dipper thrustin devicethat may be operated and control and dr line drums, such as areordinarily provide in certain types of power excavators.

as Other objects and advantages will ,later appear.

Several embodiments of the invention are illustrated in the accompanyingdrawings, inwhichz" 40, Figure 1 is a side elevation of a power shovelembodying the novel features of the present invention, 7 o Figure 2 is adetail view on a larger scale of a rtion of the dipper thrust gear Ishown in igure 1. Figure 8 is a bottom plan view of a portidn of'theboom and associated parts.

'Fi re d is a sectional view taken substantially along the line 4-4 ofFigure 2. -Fi re 5 is a iragmenta side elevation of a 50ml of somewhatdi erent form, em-

from the hoisting rotation, each'being independentl throu h the b 'trollbodying the novel features of the present invention.

, of another form of shovel constructed in accordance with the presentinvention. For convenience of explanation, the inventionis shown andwill be described as embodied in a power shovel having a longitudinallyshiftable dipper handle, although it is applicable, with little ornomodification, to shovels of that ty 0 in which the dipper handle isshiftable horizontally.

The shovel selected for illustration in cludes a wheeled truck.10,provided with a turntable 11, supporting a rotatable platform. 12 in theusual manner. A hoistin winch 13 is mounted upon the platform -1 Thehoisting winch is driven from any suitable prime mover (not shown)through an appropriate gearing, a portion of which is shown at 14. Thehoisting winch includes a main drum 15 and an auxiliary drum 16,

ployed as hoisting and dragline drums in some well known types of powerexcavators.

These drums are mounted for independent actuated gearin 14, and each einconbyindividual clutch and rake mechanisms (not shown) of any standardor approved construction.

A boom' 17 is pivotally mounted, as at 17', upon the plat orni 12. Acable 18 and sheaves 19 are. employed in the usual manner foradjustablysupporting the boom in any desired position of inclination.The

'boom carries the usual dipper 20, and .dip-

per handle 21,. in such; manner that the dipper handle is permitted botha swing.-

ing and shifting movement. In the shovel 4 illustrated in Figure 1, thedipper handle is mounted for lengthwise movement in the pivoted saddleblocks 22, 'and is provided with the usual racks 23 for engagement withthe gears 24 secured to the shipper shaft 25 the boom.

In order that the prime mover with WhlCh the shovel is provided may beutilized in efthrusting of the dipper handle, the dipper footing andcontrolling the shifting or handle is placed under the control of theauxiliary drum 16 hereinabove referred to. This maybe accomplished invarious ways, but in the present instance a cable 28 is em ployed forthis purpose. One end of this cable is wrapped about and anchored uponthe drum 16, while the other end is wrapped about and secured to thedrum 29 keyed or otherwise fixed-to the shipper shaft 25. Thearrangement is such that, when this cable is drawn in under the actionof the drum 16, the drum 29 and shipper shaft 25 are rotated and thedipper handle is thrust in one direction under the action of the gears21 and racks 23.' In'the shovel illustrated in Figure 1, the cable 28 iswrapped about the drum 29- in such direction as to produce an inwardthrust on the dipper handle when the cable is drawn in. In'order toobtain absolute control over the dipper handle and to force the dipperhandle in another direc-.

tion when the cable 28 is paid ,out, provision is made for opposing thethrusting effect produced by the tension in this cable.

In this instance, the weight of the dipper and dipper handle is utilizedfor this pur pose. The dipper is supported by a hoisting cable 31 havingone end wrapped about 7 and secured to the hoisting drum 15 in the usualmanner. This cable passes over a sheave 32,- preferably mounted adjacentthe upper end of the boom 17, and is connected to the dipper as at 33.Since in the shovel shown in Figure 1, the cable 28 is arranged toproduce an'inward thrust on the'dipper handle, the hoisting cable 31 anddipper and dipper handle are so arranged-that the dip-- per handle isnormally biased toward out-- ward movement. It will be understood, ofoourse,thatwhen the dipper is in a lower position, such as assumed whendigging, so

that the dipper handle is inclined down wardly and outwardly the dipperhandle. tends to shiftoutwardly under its own weight and the weight'ofthe dipper and contents.- Inv order that this tendency may notbedestroyed by the lifting action of the hoisting cable during a diggingstroke, the

hoisting cable is so arranged that the outward component 'of itspull,'a.s comparedwith the vertical component, is materially gmater thaninordinary practice; This may be accomplished in various ways, but inthe shovel shown in this figure this is accomplished by employing a boomof a length greater than that ordinarily employed. In this instance, theboom 17 is of such length that the distance between the shipper shaft 25and the outer end of the boom is considrequiring rotation of the drum15.

erably greater than the maximum distance between the shipper shaft 25'and connection 33.. Thus during an entire digging stroke, the dipper isbiased toward movement against the bank and againstthe tension in thecable 28.

The cable 31, under the action of the hoisting drum 15, performs theusuaLfunctions of raising and lowering the dipper and swinging thedipper handle 21 about the shipper shaft 25. In addition, however, thetension in this cable, togetherwith the combined weight of the dipperand dipper handle, maintains an outward thrust upon the dipper handle inopposition to the tension in cable 28',"so that when thefdrum 16 isreleased and the cable 28 paid out the dipper handle is shiftedoutwardly, Thus it will be seen that the dipper handle is always I underthe control of the drum. 16, and that it may be shifted in eitherdirection without Furthermore, the dipper may be raised and lowered atwill by the hoisting drum 15 inthe usual manner. a

To illustrate the operation of the shovel shown, assume that the dipperis in the lower digging position, as indicated by dotted lines in Figure1, and that the drum 16 is. held by its brake against rotation.

Upon rotation of the hoisting drum 15 in a clockwise direction, thehoisting cable is drawn in', the dipper is raised, and'the dipper handleis swung about the shipper shaft 25. As long as the drum16 is heldagainst rotation, the shipper shaft does not rotate and the dipperhandle is held against outwardshifting movement. If it is desired toobtain a bigger bite by forcing the dipper more firmly against thebank,- this is accomplished by releasing the drum 16 so as to pay'outthe cable 28. This permits the shipper shaft to rotate in a clockwisedirection under the weight of the dipper and dipper handle so as tothrust the dipper handle outwardly. If, on the other hand, it is desiredto reduce the bite 'bywithdrawing the dipper from the bank, it is onlynecessary torotate the drum 1 6 in a clockwise direction'soas to drawinthe cable 28. This action efiectsa rotation of the shipper shaft 25,against the influence ofthe weight of the dipper and dipper handle, insuch direction as to thrust the dipper handle inwardly.

When the: excavating movement has been completed and the dipper has beenraised clear of the bank,.the dipper may be readily shifted to itsextreme outward position, such as might be required for dumpingpurposes,

by merely releasing the drum 16. The inward inclination of that portionof the cable eition, it is only necessary to release the drum so as tolower the dipper, and to rotate the drum 16 in a clockwise direction soas to shift thedipper handle inwardly to the position shown.

' .The shovel shown in Figure ,5 is similar, in many respects, to thatjust described, except that no shipper shaft drum is required dipperhandle. This shovel includes a boom 17 similar to the boom abovedescribed and carrying a dipper 20' and dipper handle 21' for swingingand shifting movements. The dipper handle is slidably mounted in asaddle block 22, pivotally supported as at. upon the boom.; The dipperis raisedrand lowered by means of theihoisting cable 31" conner abovedescribed. In this instance, however, the thrust controlling cable 28'is connected at a fixed point along the dipper thereof. This cable 28'is preferably passed over a sheave 34 carried by the boom and secured toa thrust controlling drum '(not 4 shown) in a manner similar to thatabove described. The arrangement is such that the dipper and dipperhandle cooperate with the hoisting cable 31' in such manner as to bebiased toward outward shifting movement and this movement is resist'edby the tension in cable 28'. The operation of this shovel is similar tothat above described in that the dipper may beraised and lowered in theusual manner under the action of the hoisting cable'31. An outwardthrust is produced by paying out the cable 28 and an inward thrust bydrawing in this cable.

The shovel shown in Figures 6 and 7- is 5. Inthis instance, however, thedipper handle 21 is slidably supported by a pair of anti-frictionrollers 24", mounted upon a shaft 25. The dipper handle is retained inposition against the rollers 24 by the usual pivoted saddle block-22. Athrust controlling cable 28', connected at one end to a thrustcontrolling drum (not shown), passes over oneof the rollers-24, which ispreferably grooved for this purpose, and is con-- nected at the otherend to the forward end of the dipper handle 21 as at 35. The dipper issupported by a hoisting cable 31, which is connected to a hoisting drum(not shown), in the usual manner, and which is passed over a sheave 32mounted preferably adjacent the outer end of the boom 17' and thencearound ajpadlock sheave 33 and finally returned and anchored to the boomas at 36. As in the shovels above described, the arrangement of thehoisting cable, dipper and dipper handle is such that the dipper anddipper handle are biased toward outward movement, this movement beingconfor controlling the shifting movement of the nected to the dipper asat 33' in the man-- handle and preferably adjacent the outer end'similar, in many-respects, to that of Figure dipper is raised andlowered in the usual manner by the hoisting cable 31 and is with athrusting device inwhich the operation is the reversal of thosehereinabove described. This shovel includes a boom 17", which ispreferably somewhat shorter than the boom employed in the shovels abovedescribed. The dipper handle 21 rests upon a pair of anti-frictionrollers 24", rota't-ably mounted on a shaft 25, the dipper handle beingretained in engagement with the rollers by the usual pivoted saddleblock 22". In this instance, the thrust controlling cable 28", which isconnected at one end in the usual manner to a thrust controlling drum(not shown), is passed around a sheave 34", preferably mounted on theshaft 25 and freely rotatable with respect to the rollers 24". The otherend of theicable 28" is secured to the inner end of the dipperjhandle 21as at 35". By this arrangement, the tension in the cable 28" tends atall times to force the dipper handle outwardly. The

dipperis supported by a hoisting cable 31 drum (not shown). This cablepasses over the outer end of the boom, through a padlock sheave 33secured to the dipper, and thence back to theboom. This cable mav'befixed to* the boom or may be passed around a sheave 36 fixed to the boomand then con-- nected with the dipper as at 37.

point well down on the boom and preferabl in the vicinity of the shaftThus. it

This cable w s preferably connected with the boom ata 'will be-seen thatthe tension-in that end of the cable 31 between the padlock sheave 33"and the'hoom tends at all times toshift the dipper handle inwardly.

In operation, the dipper is raised and lowered in the usual manner bydrawing in or paying out thecable 31". To shift. the dipper handleoutwardly, however, the cable 28 is drawn in and to shift the dipperhandle inwardly the cable 28 is paid out, thus permitting the dipperhandle to move inwardly under the influence of the tension in the endportion of the cable 31" between the padlock sheave 33 andboom.

Various changes may be made in the embodiments of the invention abovedescribed without departing from. or sacrificing any of the advantagesof the invention as defined in the following claims:

We claim: V I

1. A power shovel havi a boom; a sheave adjacent the outer en of saidboom; a shaft permanently positioned on said boom intermediate its ends;a dipper handle,

5 trolled by the cable 28'. In operation, the ported by said shaft forswinging and shift- I shifting said handle inwardly.

ing movements; a hoisting cable passing over said sheave for swingingsaid handle,

and hoisting cable being so disposed that the net'effect of the pull ofthe hoisting cable lengthwise on the dipper handle and the component(lengthwise of'the dipper handle) of the pull of gravityon the dipper,contents and handle, shall, in all positions of the handle, tend toshift, andconstitute the sole means for shifting, the handle outwarch1y, independently of whether the dipper is 'bcingraised or lowered; andmeans for controlling such sh'ifting movement and for 2. A power shovelhaving: a boom; a

- sheave adjacent the outer end of said boom;

a dipper and dipper handle; a fixed support on said boom intermediateitsends, for supporting said dipper handle for swinginq and shiftingmovements; a hoisting cable passing over said sheave and associated withsaid dipper and dipper handle, its entire association with said handlebeing independent of 'said support; said boom, support,

dipper, dipper handle and hoisting cable being so disposed that the neteffect of the pull of the hoisting cable lengthwise on the dipper handleand the component (lengthwise of the dipper handle) of the pull ofgravity on the dipper, contents and handle, shall, in all positions ofthe handle, tend to shift, and constitute the sole means for shifting,the handle in one predetermined direction; and means for controllingsaid shifting movement and for shifting said dipper handle in the otherdirection. a 3. A power shovel having: a boom; a sheave adjacent theouter end of said boom; a dipper and dipper handle; a fixed support onsaid boom intermediate its ends, for pivotall and slidably supporting'said dipper han 1e; a,hoisting cable, passing over said' sheave andassociated with said dipper and dipper handle, its entire associationwith said handle being independent of said sup ort; said boom, sup ort,dipper, dipper iiandle and hoisting ca le being so disposed that the neteffect of the pull of the hoisting cable lengthwise on the dipper handleand the component (lengthwise of the handle) of the pull-of gravity onthe dipper, contents and handle, shall, in all positions of the handle,tend to shift, and constitute the sole handle and cable being disposedin suchmanner that the hot effect of the pull of the hoisting cablelengthwise on the dipper handle and the component (lengthwise of thedipper handle) of the pull of gravity on the dipper, contents andhandle," shall, in all positions of the handle, tend to'shift, andconstitute the'sole means for shifting, the handle outwardly; aseparately operated cable; and a separate association between said lastreamed cable and said dipper and dipper hanle,

5. A power shovel ,having: a boom; 9. sheave adjacent the outer end ofsaid boom; a dipper and dipper'handle mounted at a fixed point on saidboom intermediate its ends, for swinging and shifting movements;

a hoisting cable passing oveisaid sheave and having onlyfixed-pointassociation with said dipper and dipper handle; said boom,dipper, dipper handle and cable being disposed in such manner that thenot effect of,

the pulls of the hoisting rope and of gravity on the dipper, contentsand handle, maintains a thrust in one direction on said dipper handle,and constitutes the sole means for maintainin such thrust thereon,independently of fire position of said dipper handle; and a second lineof cable, associated with said dipper and dipper handle at only onepoint thereon, for controlling such thrusting movement and for handle inthe other direction.

I In witness whereof, I hereunto subscribe myname this 2nd day ofOctober, 1924.

WALTER EERRIS.

In witness whereof, hereunto subscribe my name this 24th day ofSeptember, 1924.

, SVANTE R. w. M. BAGER.

whereby the handle is shifted inwardly.

shifting said v

